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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt < %s -passes=instcombine -S | FileCheck %s3 4; https://bugs.llvm.org/show_bug.cgi?id=381235 6; Pattern:7; x u> x & C8; Should be transformed into:9; x u> C10; Iff: isPowerOf2(C + 1)11; C can be 0 and -1.12 13declare i8 @gen8()14declare <2 x i8> @gen2x8()15declare <3 x i8> @gen3x8()16 17; ============================================================================ ;18; Basic positive tests19; ============================================================================ ;20 21define i1 @p0() {22; CHECK-LABEL: @p0(23; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()24; CHECK-NEXT: [[RET:%.*]] = icmp ugt i8 [[X]], 325; CHECK-NEXT: ret i1 [[RET]]26;27 %x = call i8 @gen8()28 %tmp0 = and i8 %x, 329 %ret = icmp ugt i8 %x, %tmp030 ret i1 %ret31}32 33define i1 @pv(i8 %y) {34; CHECK-LABEL: @pv(35; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()36; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]]37; CHECK-NEXT: [[RET:%.*]] = icmp ugt i8 [[X]], [[TMP0]]38; CHECK-NEXT: ret i1 [[RET]]39;40 %x = call i8 @gen8()41 %tmp0 = lshr i8 -1, %y42 %tmp1 = and i8 %tmp0, %x43 %ret = icmp ugt i8 %x, %tmp144 ret i1 %ret45}46 47; ============================================================================ ;48; Vector tests49; ============================================================================ ;50 51define <2 x i1> @p1_vec_splat() {52; CHECK-LABEL: @p1_vec_splat(53; CHECK-NEXT: [[X:%.*]] = call <2 x i8> @gen2x8()54; CHECK-NEXT: [[RET:%.*]] = icmp ugt <2 x i8> [[X]], splat (i8 3)55; CHECK-NEXT: ret <2 x i1> [[RET]]56;57 %x = call <2 x i8> @gen2x8()58 %tmp0 = and <2 x i8> %x, <i8 3, i8 3>59 %ret = icmp ugt <2 x i8> %x, %tmp060 ret <2 x i1> %ret61}62 63define <2 x i1> @p2_vec_nonsplat() {64; CHECK-LABEL: @p2_vec_nonsplat(65; CHECK-NEXT: [[X:%.*]] = call <2 x i8> @gen2x8()66; CHECK-NEXT: [[RET:%.*]] = icmp ugt <2 x i8> [[X]], <i8 3, i8 15>67; CHECK-NEXT: ret <2 x i1> [[RET]]68;69 %x = call <2 x i8> @gen2x8()70 %tmp0 = and <2 x i8> %x, <i8 3, i8 15> ; doesn't have to be splat.71 %ret = icmp ugt <2 x i8> %x, %tmp072 ret <2 x i1> %ret73}74 75define <2 x i1> @p2_vec_nonsplat_edgecase0() {76; CHECK-LABEL: @p2_vec_nonsplat_edgecase0(77; CHECK-NEXT: [[X:%.*]] = call <2 x i8> @gen2x8()78; CHECK-NEXT: [[RET:%.*]] = icmp ugt <2 x i8> [[X]], <i8 3, i8 0>79; CHECK-NEXT: ret <2 x i1> [[RET]]80;81 %x = call <2 x i8> @gen2x8()82 %tmp0 = and <2 x i8> %x, <i8 3, i8 0>83 %ret = icmp ugt <2 x i8> %x, %tmp084 ret <2 x i1> %ret85}86define <2 x i1> @p2_vec_nonsplat_edgecase1() {87; CHECK-LABEL: @p2_vec_nonsplat_edgecase1(88; CHECK-NEXT: [[X:%.*]] = call <2 x i8> @gen2x8()89; CHECK-NEXT: [[RET:%.*]] = icmp ugt <2 x i8> [[X]], <i8 3, i8 -1>90; CHECK-NEXT: ret <2 x i1> [[RET]]91;92 %x = call <2 x i8> @gen2x8()93 %tmp0 = and <2 x i8> %x, <i8 3, i8 -1>94 %ret = icmp ugt <2 x i8> %x, %tmp095 ret <2 x i1> %ret96}97 98define <3 x i1> @p3_vec_splat_poison() {99; CHECK-LABEL: @p3_vec_splat_poison(100; CHECK-NEXT: [[X:%.*]] = call <3 x i8> @gen3x8()101; CHECK-NEXT: [[RET:%.*]] = icmp ugt <3 x i8> [[X]], <i8 3, i8 poison, i8 3>102; CHECK-NEXT: ret <3 x i1> [[RET]]103;104 %x = call <3 x i8> @gen3x8()105 %tmp0 = and <3 x i8> %x, <i8 3, i8 poison, i8 3>106 %ret = icmp ugt <3 x i8> %x, %tmp0107 ret <3 x i1> %ret108}109 110define <3 x i1> @p3_vec_nonsplat_poison() {111; CHECK-LABEL: @p3_vec_nonsplat_poison(112; CHECK-NEXT: [[X:%.*]] = call <3 x i8> @gen3x8()113; CHECK-NEXT: [[RET:%.*]] = icmp ugt <3 x i8> [[X]], <i8 3, i8 poison, i8 15>114; CHECK-NEXT: ret <3 x i1> [[RET]]115;116 %x = call <3 x i8> @gen3x8()117 %tmp0 = and <3 x i8> %x, <i8 3, i8 poison, i8 15>118 %ret = icmp ugt <3 x i8> %x, %tmp0119 ret <3 x i1> %ret120}121 122; ============================================================================ ;123; Commutativity tests.124; ============================================================================ ;125 126define i1 @c0(i8 %x) {127; CHECK-LABEL: @c0(128; CHECK-NEXT: ret i1 false129;130 %tmp0 = and i8 %x, 3131 %ret = icmp ugt i8 %tmp0, %x ; swapped order132 ret i1 %ret133}134 135; ============================================================================ ;136; Commutativity tests with variable137; ============================================================================ ;138 139define i1 @cv0(i8 %y) {140; CHECK-LABEL: @cv0(141; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()142; CHECK-NEXT: [[TMP0:%.*]] = lshr i8 -1, [[Y:%.*]]143; CHECK-NEXT: [[RET:%.*]] = icmp ugt i8 [[X]], [[TMP0]]144; CHECK-NEXT: ret i1 [[RET]]145;146 %x = call i8 @gen8()147 %tmp0 = lshr i8 -1, %y148 %tmp1 = and i8 %tmp0, %x ; swapped order149 %ret = icmp ugt i8 %x, %tmp1150 ret i1 %ret151}152 153define i1 @cv1(i8 %y) {154; CHECK-LABEL: @cv1(155; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()156; CHECK-NEXT: ret i1 false157;158 %x = call i8 @gen8()159 %tmp0 = lshr i8 -1, %y160 %tmp1 = and i8 %x, %tmp0161 %ret = icmp ugt i8 %tmp1, %x ; swapped order162 ret i1 %ret163}164 165define i1 @cv2(i8 %x, i8 %y) {166; CHECK-LABEL: @cv2(167; CHECK-NEXT: ret i1 false168;169 %tmp0 = lshr i8 -1, %y170 %tmp1 = and i8 %tmp0, %x ; swapped order171 %ret = icmp ugt i8 %tmp1, %x ; swapped order172 ret i1 %ret173}174 175; ============================================================================ ;176; One-use tests. We don't care about multi-uses here.177; ============================================================================ ;178 179declare void @use8(i8)180 181define i1 @oneuse0() {182; CHECK-LABEL: @oneuse0(183; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()184; CHECK-NEXT: [[TMP0:%.*]] = and i8 [[X]], 3185; CHECK-NEXT: call void @use8(i8 [[TMP0]])186; CHECK-NEXT: [[RET:%.*]] = icmp ugt i8 [[X]], 3187; CHECK-NEXT: ret i1 [[RET]]188;189 %x = call i8 @gen8()190 %tmp0 = and i8 %x, 3191 call void @use8(i8 %tmp0)192 %ret = icmp ugt i8 %x, %tmp0193 ret i1 %ret194}195 196; ============================================================================ ;197; Negative tests198; ============================================================================ ;199 200define i1 @n0() {201; CHECK-LABEL: @n0(202; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()203; CHECK-NEXT: [[TMP1:%.*]] = and i8 [[X]], -5204; CHECK-NEXT: [[RET:%.*]] = icmp ne i8 [[TMP1]], 0205; CHECK-NEXT: ret i1 [[RET]]206;207 %x = call i8 @gen8()208 %tmp0 = and i8 %x, 4 ; power-of-two, but invalid.209 %ret = icmp ugt i8 %x, %tmp0210 ret i1 %ret211}212 213define i1 @n1(i8 %y, i8 %notx) {214; CHECK-LABEL: @n1(215; CHECK-NEXT: [[X:%.*]] = call i8 @gen8()216; CHECK-NEXT: [[TMP0:%.*]] = and i8 [[X]], 3217; CHECK-NEXT: [[RET:%.*]] = icmp ugt i8 [[TMP0]], [[NOTX:%.*]]218; CHECK-NEXT: ret i1 [[RET]]219;220 %x = call i8 @gen8()221 %tmp0 = and i8 %x, 3222 %ret = icmp ugt i8 %tmp0, %notx ; not %x223 ret i1 %ret224}225 226define <2 x i1> @n2() {227; CHECK-LABEL: @n2(228; CHECK-NEXT: [[X:%.*]] = call <2 x i8> @gen2x8()229; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i8> [[X]], <i8 -4, i8 -17>230; CHECK-NEXT: [[RET:%.*]] = icmp ne <2 x i8> [[TMP1]], zeroinitializer231; CHECK-NEXT: ret <2 x i1> [[RET]]232;233 %x = call <2 x i8> @gen2x8()234 %tmp0 = and <2 x i8> %x, <i8 3, i8 16> ; only the first one is valid.235 %ret = icmp ugt <2 x i8> %x, %tmp0236 ret <2 x i1> %ret237}238